Volume sufficient for DSL plus Camera telephoto zoom and two other small lenses. This space for small utensils and lots of accessories such as memory cards, spare battery, filter remains etc. To remove the camera, however, you must pick up the backpack. In the upper compartment is room for hiking accessories, spare shirt, jacket, drinks (1 liter bottle) and meals for a day trip. Hiking poles can be attached externally. The comfort is very good, unfortunately broke twice the chest strap of the attachment to the shoulder strap. Therefore 1 star deduction. I had the backpack now two weeks in use and am, except for the small restriction, very satisfied. I find an ideal combination between daypack and Camera Storage with much comfort.